Three helicopters take part in a giant Chinese national flag display in the skies over Shanghai on Wednesday afternoon as part of 70th anniversary celebrations.

A helicopter carrying a huge national flag of China and escorted by another two flew across central Shanghai at 2pm on October 2.

The lead helicopter, a model H155, carried a 6.45-meter by 4.3-meter national flag of China. Its two escorts, both model EC-135s, sprayed colored smoke behind.

It's the fifth time the Shanghai Public Security Bureau Police Aviation Force has conducted such a flight since its establishment in 2009. The size of the flag being displayed was bigger than the previous four times.

Three helicopters take part in a giant Chinese national flag display in the skies over Shanghai on Wednesday afternoon as part of 70th anniversary celebrations.

Three helicopters take part in a giant Chinese national flag display in the skies over Shanghai on Wednesday afternoon as part of 70th anniversary celebrations.